The Abominable Dr. Phibes Poster

Dr. Phibes believes his wife's death was due to incompetence by a team of doctors, and thus begins elaborate plans to kill them.
Really like this movie with it's weirdness and 20s style but the poster they used gave away the big reveal...
You can find the movie here: https://www.youtube.com/watch?v=5XLh5ufL1po
And elsewhere if you want a copy.